def swap_two(donut,tuna):
	temp = donut
	donut = tuna
	tuna = temp
	return donut, tuna

some_numbers = [8,1,2,3,4,5,6,7]

for n in range(0,7):
	some_numbers[n], some_numbers[n+1] = swap_two(some_numbers[n], some_numbers[n+1])
	print(some_numbers)